Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
119
DataCite Metadata Store (German National Library of Science and Technology)
63
DataCite
33
LeibnizOpen (The Leibniz Association)
22
Unknown
3
ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile)
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1